7 research outputs found
Reconfigurable self-sufficient traps for ultracold atoms based on a superconducting square
We report on the trapping of ultracold atoms in the magnetic field formed
entirely by persistent supercurrents induced in a thin film type-II
superconducting square. The supercurrents are carried by vortices induced in
the 2D structure by applying two magnetic field pulses of varying amplitude
perpendicular to its surface. This results in a self-sufficient quadrupole trap
that does not require any externally applied fields. We investigate the
trapping parameters for different supercurrent distributions. Furthermore, to
demonstrate possible applications of these types of supercurrent traps we show
how a central quadrupole trap can be split into four traps by the use of a bias
field.Comment: 5 pages, 7 figure
Magnetic confinement of neutral atoms based on patterned vortex distributions in superconducting disks and rings
We propose and analyze neutral atom traps generated by vortices imprinted by
magnetic field pulse sequences in type-II superconducting disks and rings. We
compute the supercurrent distribution and magnetic field resulting from the
vortices in the superconductor. Different patterns of vortices can be written
by versatile loading field sequences. We discuss in detail procedures to
generate quadrupole traps, self-sufficient traps and ring traps based on
superconducting disks and rings. The ease of creating these traps and the low
current noise in supercurrent carrying structures makes our approach attractive
for designing atom chip interferometers and probes.Comment: 7 pages, 9 figure